I finally found the problem I have to set the background first before setting the padding. Setting the padding then setting the background doesn't work

// does not work

tv.setPadding(20, 20, 20, 20);

tv.setBackgroundResource(R.drawable.border);

// works

tv.setBackgroundResource(R.drawable.border);

tv.setPadding(20, 20, 20, 20);

原文地址：https://*.com/questions/18327498/setting-padding-for-textview-not-working